<template>
  <el-container class="home-container">
    <!-- 头部区 -->
    <el-header>
      <div>
        <img src="../assets/logo.png" alt class="header_img" />
        <span>美容美睫后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 主体区 -->
    <el-container>
      <!-- 左侧栏区 -->
      <el-aside :width="isCollapse ? '64px':'200px'">
        <div class="toggle-button" @click="toggleCollapse" >|||</div>
        <!-- 左侧栏菜单 -->
        <el-menu background-color="#545c64" text-color="#fff" active-text-color="#409eff"
        unique-opened :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
          <!-- 一级菜单 -->
          <el-submenu :index="item._id" v-for="item in menuList" :key="item._id">
            <!-- 一级菜单的模板区 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.ico_name]"></i>
              <!-- 菜单文本 -->
              <span>{{item.menu_name}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="subItem.path" v-for="subItem in item.submenu" :key="subItem._id" @click="saveNavState(subItem.path)">
              <!-- 二级菜单模板区 -->
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 菜单文本 -->
                <span>{{subItem.submenu_name}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧主体区 -->
      <el-main>
        <!-- 路由点位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
import { getMenuList } from '../api/home'
export default {
  data () {
    return {
      menuList: [],
      iconsObj: {
        user: 'iconfont icon-users',
        scope: 'iconfont icon-tijikongjian',
        product: 'iconfont icon-shangpin',
        swiper: 'iconfont icon-showpassword',
        order: 'iconfont icon-danju',
        dataStats: 'iconfont icon-baobiao'
      },
      // 菜单是否折叠
      isCollapse: false,
      // 菜单被激活的连接地址
      activePath: ''
    }
  },
  created () {
    this.getMenu()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    // 退出用户，清空token,跳转到login页面
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有的菜单
    getMenu () {
      getMenuList().then(res => {
        console.log(res.data)
        if (!res.data.data) return this.$message.error('你没有权限访问')
        this.menuList = res.data.data
        console.log(this.menuList)
      })
    },
    // 点击 切换菜单 折叠与展开功能
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
  .header_img {
    width: 60px;
    height: 100%;
  }
}

.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont {
  margin-right: 10px;
}

.toggle-button{
  background-color: #4a5064;
  font-size: 10px;
  color: #fff;
  line-height: 24px;
  text-align: center;
  letter-spacing: 0.2em; //文本间隔
  cursor: pointer; //鼠标变成一个小手图标
}
</style>
